A Hard Reset reverts a phone to its original settings and a clean OS (Operating System) removing all data and information added to the cell phone by the mobile phone user.
In essence a Hard Reset erases everything from the phone and puts the phone back to like new condition as though it’s brand new right out of the box.
1. First, please hold down power button to switch off your device.
2. Once you do that and your phone is turned off, press and hold power button with volume down button at the same time.
3. As soon you will see the LG logo you can let go of the buttons.
4. Now let your phone boot into Recovery Mode.
5. Navigate the highlighted area with volume buttons down to wipe data/factory reset and press power key to select it.